Search for Sc-K line emission from RX J0852.0--4622 Supernova remnant with Suzaku (2009)
Hiraga, Junko S., Kobayashi, Y., Tamagawa, T., Hayato, A., Bamba, A., Terada, Y., ...
We searched for evidence of line emission around 4keV from the northwestern rim of the supernova remnant RX J0852.0-4622 using Suzaku XIS data. Several papers have reported the detection of an...
Doppler-Broadened Iron X-ray Lines from Tycho's Supernova Remnant (2009)
Furuzawa, A., Ueno, D., Hayato, A., Ozawa, M., Tamagawa, T., Bamba, A., ...
We use \suzaku observations to measure the spatial variation of the Fe K$\alpha$ line with radius in the \tycho supernova remnant. The Fe line widths show a significant decrease from a FWHM value of...
A Cr-K emission line survey in young supernova remnants with Chandra (2008)
Yang, X. J., Tsunemi, H., Lu, F. J., Chen, L.
We performed a Cr-K emission line survey in young supernova remnants (SNRs) with the Chandra archival data. Our sample includes W49B, Cas A, Tycho and Kepler. We confirmed the existence of the Cr...
Takahashi, T., Kelley, R., Mitsuda, K., Kunieda, H., Petre, R., White, N., ...
The NeXT (New exploration X-ray Telescope), the new Japanese X-ray Astronomy Satellite following Suzaku, is an international X-ray mission which is currently planed for launch in 2013. NeXT is a...
Suzaku Observations of Tycho's Supernova Remnant (2008)
Tamagawa, T., Hayato, A., Nakamura, S., Terada, Y., Bamba, A., Hiraga, J. S., ...
Tycho's supernova remnant was observed by the XIS and HXD instruments onboard the Suzaku satellite on 2006 June 26-29 for 92 ks. The spectrum up to 30 keV was well fitted with a two-component model,...
Katsuda, S., Mori, K., Tsunemi, H., Park, S., Hwang, U., Burrows, D. N., ...
We report on the discovery of fast-moving X-ray--emitting ejecta knots in the Galactic Oxygen-rich supernova remnant Puppis A from XMM-Newton observations. We find an X-ray knotty feature...
The Slow X-Ray Expansion of the Northwestern Rim of the Supernova Remnant RX J0852.0-4622 (2008)
Katsuda, S., Tsunemi, H., Mori, K.
The detection of radioactive decay line of 44Ti provides a unique evidence that the gamma-ray source is a young (< 1,000 yr) supernova remnant because of its short lifetime of about 90 yr. Only two...
Asymmetric Ejecta Distribution of the Cygnus Loop revealed with Suzaku (2008)
Katsuda, S., Tsunemi, H., Miyata, E., Mori, K., Namiki, M., Nemes, N., ...
We observed a linearly sliced area of the Cygnus Loop from the north-east to the south-west with Suzaku in seven pointings. After dividing the entire fields of view (FOV) into 119 cells, we extracted...
Katsuda, S., Tsunemi, H., Uchida, H., Miyata, E., Nemes, N., Miller, E. D., ...
We present the results of a spatially resolved spectral analysis from four Suzaku observations covering the northeastern rim of the Cygnus Loop. A two-kT_e non-ionization equilibrium (NEI) model...
Performance of the Charge Injection Capability of Suzaku XIS (2007)
Nakajima, H., Yamaguchi, H., Matsumoto, H., Tsuru, T. G., Koyama, K., Tsunemi, H., ...
A charge injection technique is applied to the X-ray CCD camera, XIS (X-ray Imaging Spectrometer) onboard Suzaku. The charge transfer inefficiency (CTI) in each CCD column (vertical transfer channel)...
Spatially Resolved X-ray Spectroscopy of Vela Shrapnel A (2006)
We present the detailed X-ray spectroscopy of Vela shrapnel A with the XMM-Newton satellite. Vela shrapnel A is one of several protrusions identified as bullets from Vela supernova explosion. The...
Discovery of a Featureless X-Ray Spectrum in the Supernova Remnant Shell of G330.2+1.0 (2006)
Torii, K., Uchida, H., Hasuike, K., Tsunemi, H., Yamaguchi, Y., Shibata, S.
We report here on the first pointed X-ray observation of the supernova remnant (SNR) G330.2+1.0. The X-ray morphology is characterized by an extended shell. Its X-ray spectrum is well represented by...
Wide band X-ray Imager (WXI) and Soft Gamma-ray Detector (SGD) for the NeXT Mission (2004)
Takahashi, T., Awaki, A., Dotani, T., Fukazawa, Y., Hayashida, K., Kamae, T., ...
The NeXT mission has been proposed to study high-energy non-thermal phenomena in the universe. The high-energy response of the super mirror will enable us to perform the first sensitive imaging...
An X-ray measurement of Titan's atmospheric extent from its transit of the Crab Nebula (2004)
Mori, K., Tsunemi, H., Katayama, H., Burrows, D. N., Garmire, G. P., Metzger, A. E.
Saturn's largest satellite, Titan, transited the Crab Nebula on 5 January 2003. We observed this astronomical event with the {\it Chandra} X-ray Observatory. An ``occultation shadow'' has clearly...
Spatial Variation of the X-ray spectrum of the Crab Nebula (2004)
Mori, K., Burrows, D. N., Hester, J. J., Pavlov, G. G., Shibata, S., Tsunemi, H.
We present spectral analysis of the Crab Nebula obtained with the {\it Chandra} X-ray observatory. The X-ray spectrum is characterized by a power-law whose index varies across the nebula. The...
Year-scale morphological variation of the X-ray Crab Nebula (2003)
Mori, K., Burrows, D. N., Pavlov, G. G., Hester, J. J., Shibata, S., Tsunemi, H.
We present year-scale morphological variations of the Crab Nebula revealed by Chandra X-ray observatory. Observations have been performed about every 1.7 years over the 3 years from its launch. The...
Miyata, E., Kamazuka, T., Kouno, H., Mihara, M. Fukuda M., Matsuta, K., Tsunemi, H., ...
We have investigated the radiation damage effects on a CCD to be employed in the Japanese X-ray astronomy mission including the Monitor of All-sky X-ray Image (MAXI) onboard the International Space...
Miyata, E., Miki, M., Hiraga, J., Kouno, H., Yasui, K., Tsunemi, H., ...
We have employed a mesh experiment for back-illuminated (BI) CCDs. BI CCDs possess the same structure to those of FI CCDs. Since X-ray photons enter from the back surface of the CCD, a primary charge...
Direct X-ray Imaging of $\mu$m precision using Back-Illuminated CCD (2002)
Miyata, E., Miki, M., Tsunemi, H., Hiraga, J., Kouno, H., Miyaguchi, K.
A charge-coupled device (CCD) is a standard imager in optical region in which the image quality is limited by its pixel size. CCDs also function in X-ray region but with substantial differences in...
Chandra reveals the Dynamic Structure of the Inner Crab Nebula (2001)
Mori, K., Hester, J. J., Burrows, D. N., Pavlov, G. G., Tsunemi, H.
We present a series of monitoring observations of the Crab Nebula with the Chandra X-ray Observatory, focusing on the temporal evolution of the structure. This series of 8 observations, spanning a...
Sakano, M., Tomida, H., Matsuoka, M., Ueno, S., Komatsu, S., Shirasaki, Y., ...
Monitor of All-sky X-ray Image (MAXI) on the International Space Station (ISS) has two kinds of X-ray detectors: the Gas Slit Camera (GSC) and the Solid-state Slit Camera (SSC). SSC is an X-ray CCD...
Hiraga, J., Tsunemi, H., Miyata, E.
When an X-ray photon lands into a pixel (event pixel), the primary charge is mainly collected into the event pixel. If the X-ray landing position is sufficiently close to the pixel boundary, the...
Hiraga, J., Tsunemi, H., Short, A. D., Abbey, A. F., Bennie, P. J., Turner, M. J. L.
We have used a mesh experiment in order to measure the sub-pixel structure of the EPIC MOS CCDs on-board the XMM/NEWTON satellite. The EPIC MOS CCDs have 40 $\mu$m-square pixels which have an open...
X-ray Measurement of the subpixel structure of the XMM EPIC MOS CCD (1999)
Tsunemi, H., Yoshita, K., Short, A. D., Bennie, P. J., Turner, M. J. L., Abbey, A. F.
We report here the results of a mesh experiment to measure the subpixel structure of the EPIC MOS CCDs on board the XMM X-ray observatory. The pixel size is 40$\mu$m square while the mesh hole...
Spectroscopic Study of the Vela-Shrapnel (1999)
Tsunemi, H., Miyata, E., Aschenbach, B.
Several shrapnels have been detected in the vicinity of Vela SNR by the ROSAT all-sky survey. We present here the spectral properties of shrapnel `A' observed with the ASCA satellite. A prominent...
MAXI mission for the space station (1999)
Matsuoka, M, Kawai, N, Mihara, T, Yoshida, A, Tsunemi, H, Miyata, E, ...
Improvement of the position resolution of the CCD for X-ray use (1999)
Yoshita, K, Tsunemi, H, Miyata, E, Gendreau, K C, Bautz, M W
The X-ray CCD camera of the MAXI Experiment on the ISS/JEM (1999)
Miyata, E., Tsunemi, H., Ogata, H., Akutsu, D., Yoshita, K., Hashimoto, Y., ...
MAXI, Monitor of All-sky X-ray Image, is the X-ray observatory on the Japanese experimental module (JEM) Exposed Facility (EF) on the International Space Station (ISS). MAXI is a slit scanning camera...
ASCA observation of the Cygnus Loop Supernova Remnant (1999)
Miyata, E., Tsunemi, H., Koyama, K., Ishisaki, Y.
We present here the results of the mapping observation of the Cygnus Loop with the Gas Imaging Spectrometer (GIS) onboard the ASCA observatory. The data covered the entire region of the Cygnus Loop....
Discovery of the compact X-ray source inside the Cygnus Loop (1998)
Miyata, E., Tsunemi, H., Torii, K., Hashimotodani, K., Tsuru, T. G., Koyama, K., ...
We detected an X-ray compact source inside the Cygnus Loop during the observation project of the whole Cygnus Loop with the ASCA GIS. The source intensity is 0.11 c s$^{-1}$ for GIS and 0.15 c...
Metal Rich Plasma at the Center Portion of the Cygnus Loop (1998)
Miyata, Emi, Tsunemi, H., Kohmura, T., Suzuki, S., Kumagai, S.
We observed the center portion of the Cygnus Loop supernova remnant with the ASCA observatory. The X-ray spectrum of the center portion was significantly different from that obtained at the...